The element which is the building block of all living things is (a) oxygen (b) carbon (c) nitrogen (d) phosphorus.

The body is protected against harmful flu viruses by

(amoeba sisters video recap: pedigrees and need

Which best describes a benefit of using dna technology in medicine? a) medicine can be produced in mass quantities. b) medicine can be distributed at a reduced cost. c) medicines have fewer side effects. d) medicines are resistant to antibiotics.